Abstract: The pushing operability is freely adjustable. A switch device includes a switch including a push-in operable operation part; a housing attached to the switch; a push-in unit, turnably attached to the housing, for pushing in the operation part; a biasing unit, arranged in the housing, for biasing the push-in unit to position the operation part at a non-push-in position before being pushed in; and a biasing force adjusting unit for adjusting the biasing force applied on the push-in unit by the biasing unit at multi-levels or no level.

Abstract: A compact and light flow meter having a rapid response includes a main body having a groove portion opened in the upper portion and also having connecting portions for communicating the groove portion and the exterior at both ends of the groove portion; a detachable cover body sealing the opened upper portion of the groove portion having a rectangular sectional shape in which a measured fluid is flowed; and a circuit substrate coming in close contact with the external face of the cover body. A sensor hole opened to the measuring chamber is arranged in the cover body; and a flow sensor is arranged in the circuit substrate so as to be arranged within the sensor hole and set a detecting face to face the measuring chamber.

Abstract: A compact and light flow meter having a rapid response includes a main body having a groove portion opened in the upper portion and also having connecting portions for communicating the groove portion and the exterior at both ends of the groove portion; a detachable cover body sealing the opened upper portion of the groove portion having a rectangular sectional shape in which a measured fluid is flowed; and a circuit substrate coming in close contact with the external face of the cover body. A sensor hole opened to the measuring chamber is arranged in the cover body; and a flow sensor is arranged in the circuit substrate so as to be arranged within the sensor hole and set a detecting face to face the measuring chamber.

Abstract: A spacer has an annular concave portion, at one end face, to accept a rectifier that rectifies fluid flowing through a flow channel in a flowmeter, a protruding annular convex portion, at the other end face, of a size to fit in the annular concave portion, and fixing means, on an outer surface, for fixing the spacer to a tube of the flow channel through engagement. A rectifier unit is temporarily assembled by integrating the spacer and the rectifier that are provided alternately in series in an axial direction into a tubular unit. It is thus possible to achieve efficient assembly, by which plural rectifiers are inserted and attached inside the tube through a single insertion operation. Moreover, it is possible to address a need for a reduction of rectifiers in size or a change to the specifications regarding the number of rectifiers to be provided.

Abstract: A spacer has an annular concave portion, at one end face, to accept a rectifier that rectifies fluid flowing through a flow channel in a flowmeter, a protruding annular convex portion, at the other end face, of a size to fit in the annular concave portion, and fixing means, on an outer surface, for fixing the spacer to a tube of the flow channel through engagement. A rectifier unit is temporarily assembled by integrating the spacer and the rectifier that are provided alternately in series in an axial direction into a tubular unit. It is thus possible to achieve efficient assembly, by which plural rectifiers are inserted and attached inside the tube through a single insertion operation. Moreover, it is possible to address a need for a reduction of rectifiers in size or a change to the specifications regarding the number of rectifiers to be provided.

Abstract: A single vibration sensor producing multistage outputs corresponding to various vibrational acceleration values is disclosed. This vibration sensor is the type in which vibrational acceleration causes a movable gravitation element to move, and the movement of the element exerts pressure on a plunger which actuates a switch mechanism and outputs a signal. A feature of this vibration sensor is the switch mechanism includes a number of discrete switch units each having a different operating sensitivity. The switch units have a number of movable members which are displaced by the plunger when the vibrational acceleration causes the movable gravitation element to move, and a number of fixed contacts corresponding to these movable members with which the movable contacts come in contact. The spatial relationship of the fixed contacts with respect to the movable members is a feature which determines the operational sensitivity.